diff options
Diffstat (limited to 'crypto/bn/bn_gf2m.c')
-rw-r--r-- | crypto/bn/bn_gf2m.c | 32 |
1 files changed, 17 insertions, 15 deletions
diff --git a/crypto/bn/bn_gf2m.c b/crypto/bn/bn_gf2m.c index 287adf305a..0fc4460da8 100644 --- a/crypto/bn/bn_gf2m.c +++ b/crypto/bn/bn_gf2m.c @@ -22,30 +22,32 @@ */ # define MAX_ITERATIONS 50 -static const BN_ULONG SQR_tb[16] = { 0, 1, 4, 5, 16, 17, 20, 21, - 64, 65, 68, 69, 80, 81, 84, 85 -}; +# define SQR_nibble(w) ((((w) & 8) << 3) \ + | (((w) & 4) << 2) \ + | (((w) & 2) << 1) \ + | ((w) & 1)) + /* Platform-specific macros to accelerate squaring. */ # if defined(SIXTY_FOUR_BIT) || defined(SIXTY_FOUR_BIT_LONG) # define SQR1(w) \ - SQR_tb[(w) >> 60 & 0xF] << 56 | SQR_tb[(w) >> 56 & 0xF] << 48 | \ - SQR_tb[(w) >> 52 & 0xF] << 40 | SQR_tb[(w) >> 48 & 0xF] << 32 | \ - SQR_tb[(w) >> 44 & 0xF] << 24 | SQR_tb[(w) >> 40 & 0xF] << 16 | \ - SQR_tb[(w) >> 36 & 0xF] << 8 | SQR_tb[(w) >> 32 & 0xF] + SQR_nibble((w) >> 60) << 56 | SQR_nibble((w) >> 56) << 48 | \ + SQR_nibble((w) >> 52) << 40 | SQR_nibble((w) >> 48) << 32 | \ + SQR_nibble((w) >> 44) << 24 | SQR_nibble((w) >> 40) << 16 | \ + SQR_nibble((w) >> 36) << 8 | SQR_nibble((w) >> 32) # define SQR0(w) \ - SQR_tb[(w) >> 28 & 0xF] << 56 | SQR_tb[(w) >> 24 & 0xF] << 48 | \ - SQR_tb[(w) >> 20 & 0xF] << 40 | SQR_tb[(w) >> 16 & 0xF] << 32 | \ - SQR_tb[(w) >> 12 & 0xF] << 24 | SQR_tb[(w) >> 8 & 0xF] << 16 | \ - SQR_tb[(w) >> 4 & 0xF] << 8 | SQR_tb[(w) & 0xF] + SQR_nibble((w) >> 28) << 56 | SQR_nibble((w) >> 24) << 48 | \ + SQR_nibble((w) >> 20) << 40 | SQR_nibble((w) >> 16) << 32 | \ + SQR_nibble((w) >> 12) << 24 | SQR_nibble((w) >> 8) << 16 | \ + SQR_nibble((w) >> 4) << 8 | SQR_nibble((w) ) # endif # ifdef THIRTY_TWO_BIT # define SQR1(w) \ - SQR_tb[(w) >> 28 & 0xF] << 24 | SQR_tb[(w) >> 24 & 0xF] << 16 | \ - SQR_tb[(w) >> 20 & 0xF] << 8 | SQR_tb[(w) >> 16 & 0xF] + SQR_nibble((w) >> 28) << 24 | SQR_nibble((w) >> 24) << 16 | \ + SQR_nibble((w) >> 20) << 8 | SQR_nibble((w) >> 16) # define SQR0(w) \ - SQR_tb[(w) >> 12 & 0xF] << 24 | SQR_tb[(w) >> 8 & 0xF] << 16 | \ - SQR_tb[(w) >> 4 & 0xF] << 8 | SQR_tb[(w) & 0xF] + SQR_nibble((w) >> 12) << 24 | SQR_nibble((w) >> 8) << 16 | \ + SQR_nibble((w) >> 4) << 8 | SQR_nibble((w) ) # endif # if !defined(OPENSSL_BN_ASM_GF2m) |